Method for producing polyol esters
AssigneeOxea GmbH
InventorsGuido D. Frey, Tonia Weber, Jörg Arnold, Thorsten Kreickmann, Heinz Strutz
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Abstract
A process for preparing polyol esters by reacting polyols with linear or branched aliphatic monocarboxylic acids having 3 to 20 carbon atoms, is characterized in that a mixture of the starting compounds is allowed to react in the presence of a Lewis acid containing at least one element of groups 4 to 14 of the periodic table of the elements as a catalyst and in the presence of an adsorbent with removal of the water formed, and then the crude ester obtained is aftertreated by adding a further adsorbent which is an acidic activated carbon having a pH of 1 to 6.5.
Claims15
Process for preparing polyol esters by reacting polyols of the general formula (II)
- H—(—O—[—CR1R2—]m—)o—OH (II)
- in which R1 and R2 are each independently hydrogen, an alkyl radical having 1 to 5 carbon atoms or a hydroxyalkyl radical having 1 to 5 carbon atoms, m is an integer from 1 to 10, and o is an integer from 2 to 15
- with linear or branched aliphatic monocarboxylic acids having 3 to 20 carbon atoms, characterized in that a mixture of the starting compounds is allowed to react in the presence of a catalyst selected from the group consisting of titanium, zirconium, hafnium or tin as elements or in the form of compounds thereof and in the presence of an activated carbon adsorbent with removal of the water formed, and then the crude ester obtained is aftertreated by adding a further adsorbent which is an acidic activated carbon having a pH of 1 to 6.5.
Dependencies are inferred from the claim text.